CN110593064B - Detection device for compaction and shearing characteristics of asphalt mixture in construction compaction process - Google Patents
Detection device for compaction and shearing characteristics of asphalt mixture in construction compaction process Download PDFInfo
- Publication number
- CN110593064B CN110593064B CN201910884498.5A CN201910884498A CN110593064B CN 110593064 B CN110593064 B CN 110593064B CN 201910884498 A CN201910884498 A CN 201910884498A CN 110593064 B CN110593064 B CN 110593064B
- Authority
- CN
- China
- Prior art keywords
- compaction
- claw
- asphalt mixture
- construction
- detection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/42—Road-making materials
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
- E01C23/01—Devices or auxiliary means for setting-out or checking the configuration of new surfacing, e.g. templates, screed or reference line supports; Applications of apparatus for measuring, indicating, or recording the surface configuration of existing surfacing, e.g. profilographs
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/22—Investigating strength properties of solid materials by application of mechanical stress by applying steady torsional forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/24—Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
- G01N11/10—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by moving a body within the material
- G01N11/14—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by moving a body within the material by using rotary bodies, e.g. vane
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0021—Torsional
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0025—Shearing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0076—Hardness, compressibility or resistance to crushing
- G01N2203/0078—Hardness, compressibility or resistance to crushing using indentation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0248—Tests "on-line" during fabrication
Abstract
The invention discloses a device for detecting compaction and shearing characteristics of an asphalt mixture in a construction compaction process, which comprises a fixed rack and a detection system, wherein the detection system comprises a display, a control panel, a test claw, an electric motor, a lifting switch, a torque sensor and a temperature sensor, the control panel comprises a power switch for controlling the electric motor and a rotating speed regulator for controlling the rotating speed of the test claw, the output end of the electric motor is connected with the input end of the torque sensor, the output end of the torque sensor is connected with the input end of the test claw, the output end of the test claw is provided with a claw-shaped blade, and the temperature sensor is arranged in the claw-shaped blade. The method can simply, quickly and accurately measure the compaction detection index of the asphalt mixture in the compaction process, and the compaction detection index and the compaction degree of the asphalt pavement form double-index quality control in the compaction process, so that the method can be used for accurately evaluating the quality of the compaction effect of the asphalt mixture and determining the compaction state of the asphalt mixture in the construction process.
Description
Technical Field
The invention belongs to the technical field of asphalt mixture compaction detection devices, and relates to an asphalt mixture compaction and shearing characteristic detection device in a construction compaction process, which is used for evaluating the quality of asphalt mixture compaction quality and correspondingly monitoring and guiding the construction quality and the construction process according to a real-time detection result.
Background
Compaction is the last procedure of asphalt pavement forming, and construction compaction control is a necessary means for ensuring that the quality, physical and mechanical properties and road performance of the asphalt mixture meet the requirements. In the technical specification of asphalt pavement construction in China, compaction control indexes and methods of asphalt pavements are specified, detailed specifications of detected positions, frequency, allowable deviation and the like are also specified, and the traditional compaction detection index is pavement compaction.
In 2010, how to build new, Qiming et al [1] indicate that a simple compaction index is not comprehensive alone, and should be combined with other characteristics of the asphalt mixture and guided by the characteristics of the pavement. In 2017, when Sunbo [2] analyzes the control development situation of the compactness of the highway pavement, the situation that the asphalt pavement has different oilstone ratios at different positions and the blending of the asphalt mixture has large variability is also pointed out, and the single index of the compactness is relatively insufficient in stability and large in potential quality hazard when the single index is used for controlling the compactness.
Conventional compaction detection methods include: sand-filling method, water bag method, cutting ring method, wax sealing method and nucleon densimeter. In terms of detection methods, the construction control methods mainly refer to detection in a construction acceptance stage, and belong to post-construction detection, the detection result lags behind the compaction process, and overvoltage and undervoltage sections cannot be found in time. And the combination of compacting machines and tools and the number of times of compaction on a construction site are generally determined by experience, so that the construction process and the construction quality cannot be correspondingly adjusted and controlled according to detection results, a device and a method for detecting the compaction condition of the asphalt mixture in the corresponding compaction process are lacked, and certain difficulties exist in the aspects of quality supervision and construction process control.
In 2002, Stephen N.Goodman and Yasser Hassan et al [3] proposed that shear performance is a viable means of characterizing the permanent set of asphalt concrete mixes, and mix characteristics related to shear performance were analyzed by the on-site shear stiffness testing facility (insisst) developed by the university of Carlton, including: the performance of the binding material, the consumption of the binding material and the characteristics (type, gradation and the like) of the binding material are studied, but the study is only suitable for the detection after construction after road surface open traffic and is difficult to be used for the on-line detection of the construction.
In 2004, Jagan M.Gudimettla and L.Allen cooley, Jr et al [4] tested a mix workability test apparatus to evaluate the workability of an asphalt mix by cross probe torque inserted into the asphalt mix prior to paving. The results of the tests show that: the influence effects of different factors on the compactibility of the asphalt mixture have great difference, and the influence effects are arranged from large to small: asphalt binder characteristics, mixture temperature, aggregate type, maximum nominal aggregate particle size. The limitation is that the equipment can only measure the torque of the mixed asphalt mixture, and the prior research does not show that the workability has direct correlation with the compaction condition of the asphalt mixture and is not suitable for compaction detection in the construction stage.
In 2005, the domestic argumentary professor [5] performed indoor rotary compaction analysis using multiple sets of asphalt mixtures, and proposed that compactibility of asphalt pavements was evaluated using compaction energy index of the compaction curve from the initial compaction state to the designed compaction frequency stage, but it was difficult to determine the compaction energy of on-site construction due to boundary problems, and construction could not be directly guided.
In 2012, the changes of the shear resistance of the asphalt mixture at different temperatures are researched by [6] of Thangwen, Sunpi and the like, good correlation among different shear resistance evaluation indexes is analyzed by carrying out different shear performance tests, and the research shows that the temperature has great influence on the shear resistance of the asphalt mixture, and the temperature characteristic of the asphalt mixture needs to be fully considered when the shear resistance evaluation is carried out on the asphalt mixture.
In 2017, Beijing architecture university teacher Gaoqi, Xushi method and the like [7] form a mixture through an indoor shearing compactor, further explore the compaction and shearing characteristics of the asphalt mixture, obtain corresponding easy-to-compact temperature under the condition of using the shearing compactor, propose to evaluate the quality of the compaction performance of the mixture by using the compaction shearing stress as an index, and analyze the feasibility of evaluating the compaction condition of the mixture by using the shearing performance, but are difficult to be used for on-site mixture compaction detection due to complex equipment.
Although the compaction detection method for the asphalt mixture has been greatly developed at home and abroad, the current research mostly focuses on compaction detection of the asphalt mixture after construction, online detection is not realized, the construction process and the construction quality cannot be correspondingly adjusted and controlled according to detection results, a real-time compaction quality detection method, evaluation indexes and evaluation standards for the asphalt mixture need to be further researched, and a compaction condition detection method for the asphalt mixture in the construction compaction process is lacked.
[1] Qiming, control of compaction of shallow asphalt pavement [ J ] scientific wind, 2010(15) 216.
[2] Sunbo, the current situation of the control of the compaction degree of the asphalt pavement of the expressway and measures [ J ] Heilongjiang traffic science and technology, 2017,40(7) and 76-77.
[3]Goodman S N,Hassan Y,El Halim A E H.Shear properties as viable measures for characterization of permanent deformation of asphalt concrete mixtures[J].Transportation research record,2002,1789(1):154-161.
[4]Gudimettla J M,Cooley Jr L A,Brown E R.Workability of hot-mix asphalt[J].Transportation research record,2004,1891(1):229-237.
[5] Zhang argue, Binhuaqi, Du qu le, et al. asphalt mixture compaction characteristics influencing factor study [ J ]. proceedings of Wuhan university of science, 2012,34(6):36-41.
[6] Town, Sun Lijun, the shearing resistance of asphalt mixture at different temperatures and the evaluation index [ J ] road, 2012(3):191-195.
[7] Cheongqi. asphalt mixture compaction workability study based on shear compactors [ D ].
Disclosure of Invention
The invention aims to provide a device for detecting compaction and shearing characteristics of an asphalt mixture in a construction compaction process, aiming at the technical defects of relatively insufficient stability and large hidden quality danger of the existing single compaction index in the control of a pavement compaction process, which can simply, quickly and accurately detect the compaction detection index of the asphalt mixture in the compaction process, combine with the existing compaction index to form double-index control, can be used for accurately evaluating the compaction effect of the asphalt mixture, determining the compaction condition of the asphalt mixture in the construction process, and timely adjusting and controlling the construction process and the construction quality according to the detection result.
In order to achieve the technical purpose, the invention provides a device for detecting the compaction and shearing characteristics of an asphalt mixture in the construction and compaction process, which comprises a fixed rack and a detection system, wherein the detection system comprises a display, a control panel, a test claw, an electric motor for driving the test claw to rotate, a lifting switch for controlling the test claw to move up and down, a torque sensor and a temperature sensor, the control panel comprises a power switch for controlling the electric motor and a rotating speed regulator for controlling the rotating speed of the test claw, the output end of the electric motor is connected with the input end of the torque sensor, the output end of the torque sensor is connected with the input end of the test claw, the output end of the test claw is provided with a claw-shaped blade, and the temperature sensor is installed in the claw-shaped blade.
Preferably, the claw-shaped blade has at least 3 claws, and preferably 3 to 6 claws.
Preferably, the bottom of the claw-shaped blade is a conical tip, so that the claw-shaped blade is convenient to press into the asphalt mixture with certain compactness.
Preferably, the bottom of the fixed frame is provided with universal wheels convenient to move freely.
In the field compaction process, the compaction condition of the road surface with certain compaction degree is detected in real time at a construction site through a detection device to obtain the compaction detection index K/K of the asphalt mixturemin，K/KminThe mechanical index as the road surface compaction condition is closely related to the long-term fatigue life, the anti-rutting performance and the anti-cracking performance of the road surface. Then the compaction detection index K/K is obtained through real-time detectionminAnd in the design stage, the detection device is adopted to repeatedly detect the asphalt mixture for design according to the detection method of the invention, compare the standard value obtained after data acquisition and calibration and judge the compaction condition of the asphalt mixture by combining the compaction degree, thereby timely adjusting and controlling the construction process and the construction quality: when K/KminWhen the value is larger than the right end point value of the standard interval, the under-pressure of the road section is indicated, and the pressure supplementing construction can be carried out in time; when K/KminWhen the value is smaller than the left end point value of the standard interval, the road section is over-voltage, and over-voltage remedial measures can be taken in time; when K/KminWhen the value is within the range of the standard interval, the compaction of the road section is completed, and the next stage of construction can be carried out. Meanwhile, in the actual detection process, the asphalt mixture with the slow rotating speed and the high temperature of the test claw blades has certain self-healing property, and the damage to the constructed pavement is small when the pavement is pressed in to obtain the actual measurement data, so that the method has engineering guiding significance for the subsequent construction process according to the real-time detection data, remedies and prevents the conditions of undervoltage and overvoltage, and ensures that the asphalt mixture has certain self-healing propertyThe material combination has good compaction effect.
The invention relates to a using method of a device for detecting compaction and shearing characteristics of an asphalt mixture in a construction compaction process, which specifically comprises the following steps:
firstly, carrying out on-site asphalt mixture paving construction, namely pushing a detection device to a selected determination point after rolling by a road roller;
secondly, pressing the claw-shaped blade on the output end of the test claw into the asphalt mixture with certain compactness through the lifting switch;
turning on a power switch of an electric motor, driving the test claw to slowly rotate at a constant speed by the electric motor, and recording a temperature value T and a torque value M on the display, wherein the unit of T is N.m, and the unit of M is N.m;
step four, calculating the shear strength and the shear rigidity of the asphalt mixture by utilizing the torque value M in the step three,
in the formula: f is shear strength, G is shear stiffness, gamma is shear strain, rho is radius, IpIs the polar moment of inertia;
step five, calculating the compaction detection index K/K of the asphalt mixture by utilizing the shear strength and the shear rigidity in the step fourminAnd K is defined as the inverse of the shear stiffness,
Kminthe minimum value of the K value of the asphalt mixture in corresponding compaction degree is detected in real time to obtain the compaction detection index K/KminAnd in the design stage, the detection device is adopted to repeatedly detect the asphalt mixture for design according to the detection method of the invention, compare the standard value obtained after data acquisition and calibration and judge the compaction condition of the asphalt mixture by combining the compaction degree, thereby timely adjusting and controlling the construction process and the construction quality: when K/KminWhen the value is larger than the right end point value of the standard interval, the under-voltage of the road section is indicated, and the pressure can be supplemented in timeConstructing; when K/KminWhen the value is smaller than the left end point value of the standard interval, the road section is over-voltage, and over-voltage remedial measures can be taken in time; when K/KminWhen the value is within the range of the standard interval, the compaction of the road section is completed, and the next stage of construction can be carried out.
Compared with the prior art, the invention has the advantages that:
1. compaction detection index K/K obtained by using detection device provided by the inventionminThe method and the device form double-index control together with a compaction index, make up the defect of a single-index control method for compaction in the traditional pavement construction compaction process, can accurately judge the compaction condition of the asphalt mixture on site according to the size of the compaction detection index and the compaction degree, namely, after the compaction degree is detected, the compaction detection index is obtained by testing, and then the compaction detection index obtained by real-time detection is compared with a standard value for accurately evaluating the compaction effect of the asphalt mixture, determining the compaction condition of the asphalt mixture in the construction process, and timely adjusting and controlling the construction process and the construction quality according to the detection result.
2. The invention has real-time and rapid test results and has immediate and guidable function on the compaction process of actual construction. The compaction detection index of the asphalt mixture in the construction compaction process is measured to have real-time performance, the compaction condition of the mixture is monitored in real time and construction is guided on site in time through the real-time compactness detection index obtained on site, the under-pressure and over-pressure conditions are remedied and prevented, and the good compaction effect of the asphalt mixture is ensured.
3. The method is simple to operate and strong in implementability, and can be directly used for realizing in-situ detection on a construction site aiming at the current situation that real-time compaction control is lacked in the construction process of the asphalt mixture. In the specific implementation process, the detection device is directly transported to a construction site, and the compaction detection index of the asphalt mixture in the construction process stage can be obtained by testing the asphalt mixture with certain compaction degree after being paved and in the subsequent compaction process.
4. The invention can directly test the asphalt mixture, the torque value is measured by the slow and uniform rotation of the test claw in practical application, so that the compactibility of the mixture in practical construction is obtained, the low rotating speed is adopted, great damage to an asphalt pavement is avoided, the shear strength and the shear rigidity of the obtained asphalt mixture in the compaction process can directly reflect the mechanical property of the asphalt mixture in the construction process, and the compaction condition of the asphalt mixture can be evaluated according to the size of the compaction detection index obtained by calculation.
5. The invention has simple and reasonable structure and wide application range, and has good detection performance for various asphalt mixtures. The compaction viscosity resistance of the asphalt mixture is truly and accurately reflected by stirring the asphalt mixture and is expressed in the form of a torque value, so that the shear strength and the shear rigidity of the asphalt mixture in the compaction process are obtained, the mechanical property of the asphalt mixture in the construction process is directly reflected, whether the pressure is supplemented in time is judged, and the compaction states of the asphalt mixtures with different proportions can be accurately and immediately detected. Therefore, the method has universality and is convenient to popularize in the construction of the asphalt pavement.
Drawings
FIG. 1 is a schematic structural diagram of an asphalt mixture compaction-shear characteristic detection device in a construction compaction process according to the present invention;
FIG. 2 is a schematic view of a test jaw;
FIG. 3 is a schematic diagram of the asphalt mixture compaction-shear characteristic detection device;
wherein, 1, fixing the frame; 2. a display; 3. a control panel; 31. a power switch; 32. a rotational speed regulator; 4. a test jaw; 5. an electric motor; 6. a lifting switch; 7. a torque sensor; 8. a temperature sensor; 9. a claw-shaped blade; 10. a universal wheel.
Detailed Description
In order to make the technical means, the creation characteristics, the use purpose and the efficacy of the invention easy to understand, the invention is further described with the specific embodiments.
Referring to fig. 1-2, the device for detecting the compaction and shearing characteristics of the asphalt mixture in the preferable construction and compaction process comprises a fixed frame 1 and a detection system, wherein universal wheels 10 convenient to move freely are arranged at the bottom of the fixed frame 1 and are used for construction site detection; the detection system comprises a display 2, a control panel 3, a test claw 4, an electric motor 5 used for driving the test claw 4 to rotate, a lifting switch 6 used for controlling the test claw 4 to move up and down, a torque sensor 7 and a temperature sensor 8, wherein the control panel 3 comprises a power switch 31 used for controlling the electric motor 5 and a rotating speed regulator 32 used for controlling the rotating speed of the test claw 4, the output end of the electric motor 5 is connected with the input end of the torque sensor 7, the output end of the torque sensor 7 is connected with the input end of the test claw 4, claw-shaped blades 9 are arranged on the output end of the test claw 4, the number of the claw-shaped blades 9 is 6, the bottoms of the claw-shaped blades are conical tips, the claw-shaped blades can be conveniently pressed into mixed asphalt with a certain compaction degree, and the temperature sensor 8 is arranged in the claw-shaped blades.
Referring to fig. 3, the specific detection process is as follows:
step one, performing layered paving construction on upper, middle and lower surface layers of the asphalt mixture on site, pushing a detection device to a selected determination point after the lower surface layer is rolled by a road roller, and fixing universal wheels;
secondly, pressing the claw-shaped blade on the output end of the test claw into the asphalt mixture with certain compactness through the lifting switch;
turning on a power switch of an electric motor, driving a stirring shaft to slowly rotate at a constant speed by the electric motor, wherein the speed can be freely selected from 5 DEG/min-10 DEG/min, and recording a temperature value T and a torque value M on the display, wherein the unit of T is N.m, and the unit of M is N.m;
step four, calculating the shear strength and the shear rigidity of the asphalt mixture by utilizing the torque value M in the step three,
in the formula: f is shear strength, G is shear stiffness, gamma is shear strain, rho is radius, IpIs the polar moment of inertia;
step five, calculating the compaction detection index K/K of the asphalt mixture by utilizing the shear strength and the shear rigidity in the step fourminAnd K is defined as the inverse of the shear stiffness,
Kminthe minimum value of the K value of the asphalt mixture in corresponding compaction degree is detected in real time to obtain the compaction detection index K/KminAnd K/K in the standard table 1minThe standard interval is compared to judge the compaction condition of the asphalt mixture, so that the construction process and the construction quality are adjusted and controlled in time: when K/KminWhen the value is larger than the right end point value of the standard interval, the under-pressure of the road section is indicated, and the pressure supplementing construction can be carried out in time; when K/KminWhen the value is smaller than the left end point value of the standard interval, the road section is over-voltage, and over-voltage remedial measures can be taken in time; when K/KminAnd when the value is within the standard interval range, the lower layer is compacted, and the construction of the middle and upper layers is carried out by repeating the steps from the first step to the fifth step.
The compaction detection index K/K in Table 1minThe value corresponding to the degree of compaction is a standard value obtained by repeatedly detecting the asphalt mixture for design (the asphalt mixture for AC-13C) and collecting and calibrating data by using a detection device according to the detection method of the invention in the design stage, and it should be noted that the values in the standard table can be changed according to different asphalt mixtures for design in actual engineering, but the detection device and the detection method used are not changed essentially. The compactness is compared with the maximum theoretical density of the asphalt mixture, and the test method refers to JTG F40-2017 technical Specification for construction of road asphalt pavements.
TABLE 1 compaction test index K/KminStandard gauge with two indexes of compactness
Example 1
In this embodiment, taking the top layer AC-13C asphalt mixture as an example, the mixture is in a state after being spread, if the mixture is compacted by three road rollers in a certain road section, the rolling manner is selected as shown in table 2:
TABLE 2 Rolling mode of a certain road section
The initial pressure is rolled following the paver, the compaction degree of the asphalt mixture is determined by a non-nuclear density meter after the static pressure of the steel cylinder type road roller is adopted, and the real-time compaction detection index K/K of the mixture is determined by using a compaction-shear characteristic detection deviceminAnd the internal temperature T of the mixture. Wherein the electric motor drives the stirring shaft to slowly rotate at a uniform speed, the rotation speed can be freely selected from 5-10 degrees/min, and the detection indexes of the compaction state are shown in table 3:
TABLE 3 index for detecting initial compaction state of certain road section
The purpose of primary pressing is to level and stabilize the mixture and create conditions for secondary pressing. The compaction degree of the mixture after the initial compaction is finished can reach more than 80%, wherein the initial compaction temperature is kept between 110 and 130 ℃ and is at the normal construction temperature; degree of compaction and compaction shear characteristic index K/KminCompared with the standard values in the table 1, the compaction degrees are all more than 80% of the design requirements, and the compaction detection index K/K of the bituminous mixture of each road sectionminWithin the standard interval. As the compaction degree and the compaction detection index are qualified, the initial compaction condition of the mixture is good, and the next-stage construction can be carried out.
Repression should follow closely and go on after just pressing, and repression is that the mixture is closely knit, stable and fashioned key process, adopts the vibrated roller to roll the back, and is the same with just pressing the detection step, carries out compaction performance to bituminous mixture after repressing and detects, and compaction situation detection index is as shown in table 4:
TABLE 4 detection indexes of re-pressing and compacting conditions of certain road section
For the K2+060 road section, the temperature measured by the internal temperature of the mixture is 108.2 ℃, the compaction degree meets the design requirement, the compaction shear characteristic index meets the requirement of the table 1, the compaction condition of the mixture is good, and the next-stage construction can be carried out.
For the K2+080 road section, the temperature of the tested mixture is 110.6 ℃, and at the temperature, the tested compaction degree meets the design requirement, and the detection index K/K of the mixture compaction ismin1.24 is greater than 1.20 of the normal value under 95% of compaction degree, the internal mechanical property of the mixture does not reach the standard, the mixture is unqualified in compaction, and the mechanical property of the mixture can be improved by adopting the following modes:
1. the vibratory roller can be replaced by a rubber-tyred roller, the friction force between particles is reduced through the kneading and pressing action of the rubber-tyred roller on the mixture, and the particles are rearranged to enter gaps between large particles.
2. The rolling speed of the vibratory roller is slowed down, and the contact time of the roller and the mixture is prolonged; or a high-frequency and large-amplitude mode is adopted to generate larger exciting force.
For the K2+100 road section, the compaction degree after re-compaction is small, and the mixture compaction detection index K/KminThe road section compaction degree is 1.84 and is more than 1.70 of the normal value under 86 percent compaction degree, and the road section compaction is judged to be unqualified; because the internal temperature of the mixture is 90.4 ℃ and is lower than the normal re-pressing construction temperature of 95-115 ℃, construction remediation can not be carried out. If the compaction is continued on the basis, the compaction degree of the road section is insufficient, and the road section is easy to generate defects such as rutting and stripping in long-term use, and the road section is recommended to be shoveled and paved.
Claims (4)
1. The utility model provides an asphalt mixture compaction shearing characteristic detection device among construction compaction process, includes fixed frame (1) and detecting system, its characterized in that: the detection system comprises a display (2), a control panel (3), a test claw (4), an electric motor (5) for driving the test claw (4) to rotate, a lifting switch (6) for controlling the test claw (4) to move up and down, a torque sensor (7) and a temperature sensor (8), the control panel (3) comprises a power switch (31) for controlling the electric motor (5) and a rotating speed regulator (32) for controlling the rotating speed of the test claw (4), the output end of the electric motor (5) is connected with the input end of the torque sensor (7), the output end of the torque sensor (7) is connected with the input end of the testing claw (4), a claw-shaped blade (9) is arranged at the output end of the testing claw (4), the temperature sensor (8) is arranged in the claw-shaped blade (9), and the bottom of the claw-shaped blade (9) is a conical tip;
the method comprises the following steps of (1) carrying out on-site asphalt mixture paving construction, and pushing the detection device to a selected determination point after rolling by a road roller; a claw-shaped blade (9) on the output end of the testing claw (4) is pressed into the asphalt mixture with certain compactness through a lifting switch (6); turning on a power switch (31) of an electric motor (5), driving a testing claw (4) to slowly rotate at a constant speed by the electric motor (5), and recording a temperature value T and a torque value M on a display (2), wherein the unit of T is N.m, and the unit of M is N.m; calculating the shear strength and the shear rigidity of the asphalt mixture by utilizing the torque value M:
in the formula: f is shear strength, G is shear stiffness, gamma is shear strain, rho is radius, IpIs the polar moment of inertia;
and then calculating by using the shear strength and the shear rigidity to obtain a compaction detection index K/Kmin of the asphalt mixture, wherein K is defined as the reciprocal of the shear rigidity, and Kmin is the minimum value of the K value of the asphalt mixture at the corresponding compaction degree.
2. The device for detecting the compaction-shearing characteristic of the asphalt mixture in the construction compaction process according to claim 1, wherein: the claw-shaped blades (9) have at least 3 claws.
3. The device for detecting the compaction-shearing characteristic of the asphalt mixture in the construction compaction process according to claim 2, wherein: the number of claws of the claw-shaped blade (9) is 3-6.
4. The device for detecting the compaction-shearing characteristic of the asphalt mixture in the construction compaction process according to claim 1, wherein: the bottom of the fixed frame (1) is provided with a universal wheel (10) which is convenient to move freely.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910884498.5A CN110593064B (en) | 2019-09-19 | 2019-09-19 | Detection device for compaction and shearing characteristics of asphalt mixture in construction compaction process |
| US16/861,975 US11549225B2 (en) | 2019-09-19 | 2020-04-29 | Device for detecting compaction and shear strength characteristics of asphalt mixture during construction compaction |
| JP2020119150A JP7016181B2 (en) | 2019-09-19 | 2020-07-10 | Equipment for detecting mechanical properties during the compaction construction process of asphalt mixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910884498.5A CN110593064B (en) | 2019-09-19 | 2019-09-19 | Detection device for compaction and shearing characteristics of asphalt mixture in construction compaction process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110593064A CN110593064A (en) | 2019-12-20 |
| CN110593064B true CN110593064B (en) | 2021-07-30 |
Family
ID=68861042
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910884498.5A Active CN110593064B (en) | 2019-09-19 | 2019-09-19 | Detection device for compaction and shearing characteristics of asphalt mixture in construction compaction process |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US11549225B2 (en) |
| JP (1) | JP7016181B2 (en) |
| CN (1) | CN110593064B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115522437A (en) * | 2022-09-30 | 2022-12-27 | 交通运输部公路科学研究所 | Evaluation method and device for deflection measurement performance of pavement laser high-speed deflectometer |
| CN116026711B (en) * | 2023-03-30 | 2023-06-20 | 江苏腾达工程检测有限公司 | Asphalt pavement shearing fatigue degree detection equipment |
| CN117265971B (en) * | 2023-11-20 | 2024-02-27 | 山西振兴公路监理有限公司 | Thickness detection equipment for highway engineering pavement and detection method thereof |
Family Cites Families (28)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49110394A (en) * | 1973-02-20 | 1974-10-21 | ||
| SU873018A1 (en) * | 1978-06-01 | 1981-10-15 | Ордена Октябрьской Революции Всесоюзный Государственный Проектно-Изыскательский И Научно-Исследовательский Институт Энергетических Систем И Электрических Сетей "Энергосетьпроект" | Working tip of device for investigating physical mechanical properties of ground by rotational shear |
| JPS6129773Y2 (en) * | 1979-02-07 | 1986-09-02 | ||
| JPH0365712U (en) * | 1989-10-25 | 1991-06-26 | ||
| US5109702A (en) * | 1990-06-27 | 1992-05-05 | The United States Of America As Represented By The Secretary Of The Air Force | Method for determining liquefaction potential of cohesionless soils |
| JP2565920Y2 (en) * | 1991-07-03 | 1998-03-25 | 日本鋪道株式会社 | Compaction degree measuring device |
| US5365793A (en) * | 1993-03-01 | 1994-11-22 | State Of Oregon Acting By And Through Oregon State University | Equipment and method for environmental testing of bituminous specimens |
| SE501234C2 (en) * | 1993-04-29 | 1994-12-12 | Thurner Geodynamik Ab | Method and apparatus for measuring and documenting packing results and control of a roller when packing a laid substrate |
| US5952561A (en) * | 1997-03-19 | 1999-09-14 | Iowa State University Research Foundation, Inc. | Real time asphalt pavement quality sensor using a differential approach |
| US6694823B2 (en) * | 2000-03-23 | 2004-02-24 | Wisconsin Alumni Research Foundation | Apparatus and method for testing material performance |
| US6609407B1 (en) * | 2000-11-06 | 2003-08-26 | Ingersoll-Rand Company | Test apparatus for a wrench used to test previously tightened fasteners |
| CN101251529B (en) * | 2008-03-28 | 2011-02-02 | 南京工业大学 | Asphalt mixture workability index tester |
| US8020451B2 (en) * | 2008-07-09 | 2011-09-20 | Instrotek, Inc. | System and method for conditioning and detection of moisture damage in asphalt mixes |
| US20130290062A1 (en) * | 2012-04-26 | 2013-10-31 | Trimble Navigation Limited | Paving coordination method and system |
| DE102012208554A1 (en) * | 2012-05-22 | 2013-11-28 | Hamm Ag | Method for planning and carrying out soil compaction operations, in particular for asphalt compaction |
| CN102841038B (en) * | 2012-09-29 | 2015-02-04 | 长安大学 | Detection device and method for self-healing property of asphalt |
| SE539312C2 (en) * | 2015-06-10 | 2017-06-27 | Conny Andersson Med Firma Ca Konsult | A method of determining the quality of a newly produced asphalt pavement |
| CN205138951U (en) * | 2015-09-07 | 2016-04-06 | 厦门华特集团有限公司 | Multi -functional warm mix asphalt mixture shear flow resistance tester |
| CN205228971U (en) * | 2015-12-21 | 2016-05-11 | 深圳市岩土综合勘察设计有限公司 | Dedicated vane shear test loading device of ground mechanical test |
| WO2017132414A1 (en) * | 2016-01-28 | 2017-08-03 | Coe William B | Rolling cyclic fatigue test platform for determining asphalt ductility |
| CN105891015B (en) * | 2016-06-07 | 2020-06-19 | 中国海洋石油集团有限公司 | Box-type sampling shear strength testing device |
| DE102017008602A1 (en) * | 2017-09-13 | 2019-03-14 | Bomag Gmbh | Method for monitoring the compaction process in road construction and road roller |
| US11339540B1 (en) * | 2019-01-28 | 2022-05-24 | Roof Asset Management Usa, Ltd. | Method and system for evaluating and repairing a surface and/or subsurface |
| CN110044732A (en) * | 2019-04-30 | 2019-07-23 | 中国地质大学（武汉） | A kind of automatic cross plate boxshear apparatus |
| CN110595914B (en) * | 2019-09-19 | 2022-02-11 | 长沙理工大学 | Method for detecting compaction and shearing characteristics of asphalt mixture in construction compaction process |
| US11673477B2 (en) * | 2020-07-23 | 2023-06-13 | Caterpillar Inc. | Electric machine with interchangeable power modules |
| US11493378B2 (en) * | 2020-09-22 | 2022-11-08 | Caterpillar Inc. | Fuel level measurement system for a machine |
| DE102020128842A1 (en) * | 2020-11-03 | 2022-05-05 | Hamm Ag | Process for compacting asphalt material |
-
2019
- 2019-09-19 CN CN201910884498.5A patent/CN110593064B/en active Active
-
2020
- 2020-04-29 US US16/861,975 patent/US11549225B2/en active Active
- 2020-07-10 JP JP2020119150A patent/JP7016181B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| US11549225B2 (en) | 2023-01-10 |
| US20210087759A1 (en) | 2021-03-25 |
| JP7016181B2 (en) | 2022-02-04 |
| CN110593064A (en) | 2019-12-20 |
| JP2021046778A (en) | 2021-03-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110595914B (en) | Method for detecting compaction and shearing characteristics of asphalt mixture in construction compaction process | |
| CN110593064B (en) | Detection device for compaction and shearing characteristics of asphalt mixture in construction compaction process | |
| CN103852575B (en) | Method and device for continuously detecting compactness of asphalt concrete pavement | |
| CN102345269B (en) | Rubber asphalt compacting technology based on pavement quality indicator | |
| CN108334668A (en) | Consider the earth and rockfill dam compaction quality method for quick predicting that parameter uncertainty influences | |
| Bonnot | Asphalt aggregate mixtures | |
| CN106442058B (en) | A kind of equivalent Compaction Effort method for testing and detecting of asphalt and application | |
| CN107966548B (en) | Method for predicting rut occurrence time of asphalt pavement unstability | |
| CN107219131B (en) | A kind of asphalt horizontal shear performance test apparatus and method considering local axial compressive force | |
| CN107560951A (en) | Half-flexible pavement asphalt skeleton and cement mortar boundary strength method of testing | |
| CN110927222A (en) | Asphalt mixture quality evaluation method for quantifying temperature and frequency influence factors | |
| CN106245495A (en) | Rock-fill dams method for detecting compacting quality based on subgrade reaction test | |
| Ding et al. | Analysis of viscosity test conditions for crumb-rubber-modified asphalt | |
| CN108570907B (en) | Construction method for in-situ cold recycling of foamed asphalt | |
| CN103513107A (en) | Battery pole piece and detecting method thereof | |
| CN102967520A (en) | Method for measuring aggregate crushing value | |
| Zhang et al. | Inspection method and evaluation standard based on cylindrical core sample for rutting resistance of asphalt pavement | |
| Hou et al. | Evaluation of rutting and friction resistance of hot mix asphalt concrete using an innovative vertically loaded wheel tester | |
| Holleran et al. | Effect of bio-rejuvenator on recycled porous asphalt mixes | |
| Dong et al. | Laboratory investigations of the effects of asphalt mortar and its viscoelasticity on the workability of asphalt mixtures | |
| CN110361427A (en) | A kind of asphalt mixture gradation evaluation method based on dielectric property | |
| CN111305179A (en) | Natural gravel roadbed quality detection and evaluation method based on vibration frequency | |
| CN109596428A (en) | The unified evaluation method of fatigue performance of asphalt mixture under a kind of different loading | |
| CN103792148A (en) | Evaluation index for anti-shearing performance of waterproof bonding layer paved on bridge deck | |
| Liao et al. | Permanent deformation response parameters of asphalt mixtures for a new mix-confined repeated load test |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |